Possible top cells for next-generation Si-based tandem solar cells.

Area of Science:

• Photovoltaics
• Materials Science
• Renewable Energy

Background:

• Silicon (Si)-based solar cells dominate the photovoltaic market due to high efficiency, low cost, and stability.
• Current Si solar cells are approaching their theoretical efficiency limits.
• Si-based tandem solar cells present a viable strategy to surpass single-junction efficiency limits.

Purpose of the Study:

• To review recent advancements in Si-based tandem solar cells with various top-cell materials.
• To identify key challenges hindering the commercialization of these tandem devices.
• To propose novel top-cell materials for future high-performance, low-cost Si-based tandem solar cells.

Main Methods:

• Literature review of Si-based tandem solar cells using top cells like III-V, perovskite, CdTe, CIGS, and amorphous silicon.
• Analysis of current bottlenecks and limitations in device development and commercialization.
• Exploration and suggestion of potential new top-cell materials.

Main Results:

• Summarized progress in Si-based tandem solar cells incorporating diverse top-cell technologies.
• Identified significant challenges impeding widespread adoption.
• Highlighted promising candidate materials including Sb2S3, Se, CdSe, and Cu2O for future tandem applications.

Conclusions:

• Si-based tandem solar cells are crucial for exceeding current efficiency benchmarks.
• Overcoming existing technical and economic hurdles is essential for commercial viability.
• Emerging materials offer promising avenues for next-generation, high-performance Si-based tandem solar cells.